#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < int(n); i++)
using ll = long long;
using P = pair<int, int>;

const string ans = "kadomatsu";

int main() {
    string s;
    cin >> s;
    rep(i, (1 << 9)) {
        string t = "";
        rep(j, 9) {
            if ((i >> j) & 1) t += ans[j];
        }
        if (t == s) {
            cout << "Yes" << endl;
            return 0;
        }
    }
    cout << "No" << endl;
    return 0;
}